Ranald macintosh macdonald



R. M. MACDONALD.

AUTOMATIC GOVERNOR.

No. 559,181. PatentedApr. 28,1896.

UNITED STATES I "PATENT OFFICE.

AUTOMATIC GOVERNOR.

SPECIFICATION formingpart of Letters Application filed D m r 18, 1894.$erial No- 582,230. (No in England December 10,1894,No. 23,999,

To aZZ whom it may concern:

Be it known that I, RANALD MACINTOSH MACDONALD, of 32 Cathedral Square,Christchurch, in the Provincial District of Canterbury, in the Colony ofNew Zealand, have invented an Improved Automatic Governor, of which thefollowing is a specification.

Patents have been granted in Great Britain, No. 23,999, dated December10, 1894; in France, No. 243,509, dated'March 26, 1895, and in NewZealand, N 0. 7,209, dated October 15, 1894.

My invention includes a rotary receptacle for containing a movablemedium adapted to be affected by centrifugal force and to affect theflexible Wall of the receptacle, the change in which is communicatedthrough suitable connections to a valve or other device controlling thespeed of the machine.

In the drawings, Figure 1 is a part elevation and part sectional View ofone form of my invention, and Fig. 2 is a similar View of amodification.

In Fig. 1 the vessel a is of spherical form and composed of flexiblematerial, and is rotated through power applied to the bearing *2", Whichis tubular and extends up Within the vessel above the level of themercury. The valve-rod m extends from the top of the receptacle downthrough the tubular bearing. A metallic protectingcasing O incloses theam No. 559,181, dated April 28, 1896.

model.) Patented in New Zealand October 15, 1894, No. 7,209; and inFrance March 26,1895,N0. 248,509.

vessel. The vessel will expand in a horizontal plane and contractvertically when the speed increases above that determined upon, and thevalve-controlling rod m will be moved vertically; This action is due tothe centrifugal action of the contained quicksilver or other medium whenaffected by the centrifugal force. 7

In Fig. 2 the vessel and other parts are substantially the same, the rod112 extending upward from the vessel, and radial paddles or arms n beingused, attached to a rotary shaft is driven from the engine, said armssetting the mercury in rapid movement. In this instance the vessel a maybe fixed in position.

I do not Wish to limit myself to mercury, as any equivalent centrifugalmeans may be used.

I claim A centrifugal governor comprising a spherical receptacle offlexible material containing mercury or the'like adapted to expand thereceptacle by centrifugal force and the valverod connected to theflexible Wall of the receptacle, substantially as described.

Dated this 30th day of October, 1894.

1tANALD-tIltCINTOSlI IIIAODONALD.

Witnesses HENRY HAMPTON RAYWARD,

SAMUEL OUMINe.

